Muffler for gas-engines.



No. 792,804. PATENTED JUNE 20, 1905. D. G. WILLIAMS.

MUFFLER FOR GAS ENGINES.

APPLICATION FILED OCT. 31, 1904.

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Iatented June 20, 1905.

PATENT OFFICE.

DANIEL G. WVILLIAMS, OF CHARLEVOIX, MICHIGAN.

MUFFLER FOR GAS-ENGINES.

SPECIFICATION forming part of Letters Patent No. 792,804,dated June 20,1905.

Application filed October 31, 1904:. Serial No. 231,032.

To all whmn/ '17; may cancer/1,:

Be it known that 1, DANIEL G. \VILLIAns, a citizen of the United Statesof America, residing at Charlevoix, in the county of Oharlevoix, Stateof Michigan, have invented certain new and useful Improvements inMufflers for Gas- Engines, of which the following is a specification,reference being had therein to the accompanying drawings, in whichFigure 1 is a longitudinal sectional view; Fig. 2, a transversesectional view on the line 11 11 of Fig. 1, and Fig. 3 a longitudinalsectional view showing the muffler used in tandem.

The object of this invention is to provide the muffler with a circuitouspath through a series of chambers gradually increasing in size, whichwill effectively reduce the powerful intermittent exhaust impulses fromthe engine-cylinder to a noiseless and approximately uniform speed atthe exhaust end of the muflier, as more fully hereinafter set forth.

To the accomplishment of this object and such others as may hereinafterappear, the

invention consists of the parts and combination of parts hereinafterfully described, and particularly pointed out in the appended claims,reference being had to the accompanying drawings, forming a part of thisspecification, in which the same reference characters designate likeparts throughout the several views.

Referring to the "arious parts by numerals, 1 designates the outercylinder or casing, 2 the exhaust-head thereof, and 3 the inlet-head,these heads being secured within the ends of the outer casing. Theinlet-head is provided. with a central opening t to receive the exhaust-pipe from the gas engine cylinder. Within the casing 1 and asuitable distance from the inlet-head 2 is a transverse partition orwall 5, which forms, with the head 2, a large expansion-chamber 2. Thiswall is formed at its center with an outward-extending substantiallyconical spreader 7, the point of said spreader being axially in linewith the center of the outlet 4. The wall of the spreader curvesoutward, as shown, and joins the outer face of the partition in such amanner that the outflowing gas will be diverted outward through theopening in head 2.

The partition 5 is formed on its inner surface with an inward-extendingannular flange 8, to which is secured one end of a cylinder 9, saidcylinder being concentric with the outer casing 1 and of considerablysmaller diameter, so that an annular expansion-chamber 10 is formedbetween the two cylinders. This partition is also provided with an annular series of perforations 11, which put the expansion-chamber 2 incommunication with the chamber 10. The cylinder 9 terminates short ofthe head 3. The head 3 is formed with a central annularinward-extendingflange 12, which is considerably smaller in diameterthan the cylinder 9, and secured to and inclosing said annular flange isa central cylinder 13, whose free end terminates short of the partition5. The inner surface of the head 3 outside of the flange 12 is formedconcave in order to direct the expanding gas from the space 14 into thespace 10 between the cylinder 9 and the casing 13. The partition 5 onits inner face is formed with an annular concave channel which for-ms acentral substantially conical projection 15, the walls of said channeldirecting the gas into cylinder 9 and toward the exhaust. The outletthrough the exhaust-head is preferably of substantially the same area asthe inlet.

The operation of the device is apparent from the foregoing description,and a detail description thereof is deemed unnecessary.

It will be apparent to those skilled in the art that various mechanicalembodiments of the invention are possible, and I therefore do not wishto be limited to the exact arrangement and construction shown. Forinstance, two of the mufflers may be arranged in tandem, as shown inFig. 3, for use on larger engines without departing from the spirit ofthe invention.

Vhat I claim, and desire to secure by Letters Patent, is-

1. A mufiier, consisting of a casing provided with a head at each endthereof, each head being provided with an opening, a partition in thecasing provided with an annular series of openings near the casing, saidpartition forming an expansion-chamber between it and one of the heads,an open-ended tube attached to this partition inside of said series ofopenings and extending to near the opposite head, and another tubeattached to this latter head over its opening and extending to near saidpartition, whereby a circuitous passage is formed between onehead andthe partition, and an expansion-chamber is formed between the other headand the partition.

2. A muifler, consisting of a casing provided with a head at each endthereof, each head being provided with an opening, a partition in thecasing provided with an annular series of openings near the casing, saidpartition forming an expansion-chamber between it and one of the heads,an open-ended tube attached to this partition inside of said series ofopenings and extending to near the opposite head, and another tubeattached to this latter head over its opening and extending to near saidpartition, whereby a circuitous passage is formed betweenone head andthe partition, and an expansion-chamber is formed between the other headand the partition, and another muffler device arranged tandem to theaforesaid muffler and constructed substantially like said muflier, theexhaust-head of the first muffler serving as the inlet-head of thesecond muffler, for the purpose set forth.

In testimony whereof I hereunto aflix my signature, in the presence oftwo witnesses,this 24th day of August, 1904.

DANIEL G. WILLIAMS.

Witnesses:

ALDEN E. ORoss, GEo. G. WILLIAMS.

